IESO Capacity Auction 2025: What Ontario Facilities Need to Know
A guide to Ontario’s IESO capacity auction, including eligibility requirements, timelines, and strategies for maximizing your facility’s participation.
Ontario’s Evolving Grid
Ontario’s electricity system is undergoing significant transformation. As nuclear refurbishments continue and demand grows from electrification, the IESO has implemented capacity auctions to ensure resource adequacy.
What Is the IESO Capacity Auction?
The capacity auction is a competitive mechanism where resources, including demand response, bid to provide capacity during specified commitment periods. Winners receive capacity payments for being available to reduce demand when called.
Key Dates for 2025
| Milestone | Date |
|---|---|
| Auction opens | March 2025 |
| Bid submission deadline | April 2025 |
| Results announced | May 2025 |
| Commitment period begins | May 2026 |
Eligibility Requirements
To participate, your facility must:
- Minimum size: 1 MW of curtailable capacity (can be aggregated across multiple sites)
- Metering: Interval metering with IESO-approved data access
- Baseline: Established consumption baseline methodology
- Performance: Demonstrated ability to curtail within notification timeframes
Participation Options
Direct Participation
Large facilities (10+ MW) can register directly with IESO. This requires dedicated resources for market operations, compliance, and settlement.
Aggregator Participation
Working with an aggregator like Rodan Energy allows smaller facilities to participate and provides:
- Market expertise and bidding strategy
- Aggregation across multiple sites
- Compliance management
- Performance optimization
- Settlement and payment processing
Auction Strategy
Successful participation requires understanding:
Bid pricing: Capacity prices are set through competitive auction. Understanding your true costs of curtailment helps set competitive but profitable bids.
Portfolio approach: Aggregating diverse facilities provides operational flexibility and reduces performance risk.
Historical performance: IESO tracks participant performance. Strong historical performance improves future qualification.
Revenue Expectations
The 2024 capacity auction cleared at approximately $90-110/MW-day for demand response resources. For a 5 MW participant, this translates to:
Annual capacity revenue: $164,000 – $201,000
Plus additional payments for actual curtailment events when called.
Getting Started
The IESO capacity auction represents a significant revenue opportunity for Ontario facilities with flexible loads. Contact our Ontario team to assess your eligibility and develop a participation strategy.
Ready to Explore Your Energy Opportunities?
Our team can assess your facility's potential and develop a customized strategy.
